Bobbin and spindle connector.



UNITED STATES latented. May 24, 1904. i

PATENT OFFIcE.

FREDERICK SAWORSKI, .OF BOSTON, MASSAOHUSETTS..

BOBBIN AND SPINDLE CONNECTOR- SPECIFICATION forming part of LettersPatent No. 760,704, dated May 24, 1904. A li atiofl fil d November 14,1903.- Serial No. 181,115. (No model.)

' To all whom it may concern: l

vIO

Be it known that I, FREDE ICK W. SAwoR- sKI, of Boston, county ofSuffolk, State of Massachusetts, h ave invented an Improvement in Bobbinand Spindle Connectors, of which .the following description, inconnection with the accompanying drawings, is a specification, likecharacters on the drawings representing like parts.

This invention relates to a means for connectingla bobbin to a spindle,and more especially to that class of devices which connect the bobbinand spindle by means of springwhich isprovided with means whichIenablethe bobbin-engaging fingers to maintain the same relative position withrespectto the side i of the base of a bobbin when in difierent positionswith respect to thespindle. I accom-- .plish this object by the meansdisclosed in the accompanyingldrawings, in which Figure 1 is a sideelevation of aspindle and bobbin provided with my improved connectingmeans. Fig. 2 is a plan view of the con- Fig. '3 is a sectional viewonthe line w m of Fig. 2. Figs. 4 and 5 are sectional views on the lines yy, and a z, respectively, of Fig.3. Fig. 6is'a side elevation of theconnector., Figs. ''7, 8, .9, and 10 are detail views of one of thespring-fingers.

A bobbin a, is mounted on the'usual spindle I), said bobbin being ofcommon form and having an enlarged base 0, provided with the usualannular groove a The connector comprises two dished circular plates 0ol, oppositely arranged, with their bottoms clamped firmly together by ahollow rivet e, the latter being adapted to be driven onto the spindle,so that it will be firmly se.

cured thereon in the desired position. These plates thus unite to form acircular support having an annular groove f in its periphery. The upperplate a is provided with two rec- 5 tangular-shaped diametricallyoppositely arranged notches, 0 0 and two fingers -g h are provided, onebeing arranged in each notch. Saidfingers are each respectively providedwithasemicircular-shapedspring 'g h, which are preferably formedintegrally with their respective fingers andextend at right anglestherefrom. The sides of each finger g h fit somewhat closely into thenotches 0 0 and are held against the bottoms thereof by the springs g h,which are arranged in opposite portions of the annular groove f of thesupport, the end of one spring bearing against the outer side of thefinger to which the opposite spring is connected, as shown in Figs. 3 to6. As the bottom portion of each finger forms one end portion of thecorresponding semicircular spring of which the finger is-a part and asthe opposite end portion of the spring overlaps the other finger, itwill be apparent,

that each spring'is somewhat more than a semicircumference in length,and therefore by its own tension holds itself in the annular groove f bygripping the support in the bottom of said groove at points which are onthe same side of a diameter, while the main portion of the spring is onthe'opposite side of the same diameter. Said springsare each provided attheir'ends withan upwardly-arranged pro-' jecting lug g if, said lugsbeing arranged in notches 0' 0 the width of said'lugs preferably beingless than half the width of'said notches and the end portions of eachspring extending across one of the notches c'- 0 so that the side notch.

wholly essential, but they preferably are .bent so that theirbobbin-engaging faces are bodily outward in their respective notches adistance correspondingto'thediameter of the bobbin-base, at the sametime maintaining the same relative position with relation to the sideoffthe bobbin-base within certain limits. It

The exact shape of the fingers g h isnot' too will be observed whileeach spring to an extent holds its corresponding finger from outwardmovement that each spring also holds the opposite finger from suchmovement with approximately the same degree of force.

As each finger is moved outward the end portion of the opposite springwhich rests against it will be drawn across it, as indicated at thedotted position in Fig. 6, practically the limit of the outward movementof a finger being reached when the inner edge of the lug which restsagainst it is drawn against the side of the notch in which it islocated, as shown in Fig. 6.

Both fingers g h and their springs are exactly the same in all respects,so that they are interchangeable and may be stamped out with the samedie. As each plate 0 (Z maybe died out of sheet metal and as the meansfor connecting them is simple and inexpensive, it will be apparent thatthe cost of making and assembling the parts will be small. v

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is i l. A spindle and bobbin connectorcomprising a circular support secured to the spindle and having aperipheral groove, and a pair of notches in the upper side thereofleading into said groove, a bobbin engaging finger arranged in eachnotch and extending upward from said support, and a spring connected toeach finger, each spring being arranged in said groove and extending apart of the distance about said support, substantially as described. I

2. Aspindle and bobbin connector comprising a circularsupportsecured tothe spindle and having a peripheral groove, a pair of bobbin-engagingfingers extending upward therefrom, a semicircular-shaped springconnected to each finger and extending at right angles thereto from thelower end thereof, said springs being located in opposite portions ofsaid groove, the extreme end of the spring of one finger bearing againstthe outer side of the opposite, finger, substantially as described.

' '3. A spindle and bobbin connector comprising a circular supportsecured to the spindle and having a peripheral groove and a pair ofnotches in the upper side thereof leading into said groove, a bobbinengaging finger arranged in each notch and extending upward from saidsupport, and a spring connected to each finger, each spring beingarranged in said groove and extending a part of the distance about saidsupport, a lug on the extreme end portion of each spring, each lug beingof less width than said notches, and the lug of,one spring bearingagainst the outer side of the finger of the other spring, substantiallyas described.

4. A spindle and bobbin connector comprising a circular support securedto the spindle and having a peripheral'groove a pair of bobbin-engagingfingers extending upward therefrom at diametrically opposite points, apair of. semicircular-shaped springs oppositely arranged in said groove,each spring being connected at one end to one finger and bearing againstthe outer side of the opposite linger, substantially as described.

5. A spindle and bobbin connector comprising a circular support securedto the spindle and having a peripheral groove, :1. pair ofbobbin-engaging fingers extending upward therefrom, anda springconnected to each finger, each spring being arranged in said groove andextendingmore than half of the distance about said support,substantially as described.

6. A spindle and bobbin connector comprising a circular support securedto the spindle and having a peripheral groove, a pair of bobbin-engagingfingers extending upward therefrom, a semicircular-shaped springconnected to each finger and extending at right angles thereto from thelower end thereof, somewhat more than half the circumference of saidsupport, said springs being located in opposite portions of said groove,substantially as described.

7 A spindle and bobbin connector comprising a circular support securedto the spindle and having a peripheral groove, and a pair of notches inthe upper side thereof leading into said groove, a bobbin engagingfinger arranged in each notch and extending upward from said support,and a spring connected to each finger at one end, each spring beingarranged in said groove and having a projection on its opposite endarranged in one of said notches, substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

FREDERICK W. SAVVORSKI.

Witnesses: Y

LOUIS H. HARRIMAN, H. B. DAVIS.

